• 제목/요약/키워드: Optical crosstalk

검색결과 123건 처리시간 0.018초

Crosstalk evaluation in multiview autostereoscopic three-dimensional displays with an optimized diaphragm applied

  • Peng, Yi-Fan;Li, Hai-Feng;Zheng, Zhen-Rong;Xia, Xin-Xing;Yao, Zhi;Liu, Xu
    • Journal of Information Display
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    • 제13권2호
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    • pp.83-89
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    • 2012
  • The crosstalk evaluation of multiview autostereoscopic three-dimensional (3D) displays is discussed, with both the human and technical factors investigated via image quality assessment. In the imaging performance measurements and analysis for a multiview autostereoscopic display prototype equipment, it was inferred that crosstalk would have both a positive and a negative effect on the imaging performance of the equipment. The importance of the attached diaphragm in the crosstalk evaluation was proposed and then experimentally verified, using the developed prototype equipment. The luminance distribution and crosstalk situation were given, with two different diaphragm arrays applied. The analysis results showed that the imaging performance of this 3D display system can be improved with minimum changes to the system structure.

광 버스트 스위칭을 위한 광 교환기에서의 다중 누화고장 진단기법 (Diagnosis of Multiple Crosstalk-Faults in Optical Cross Connects for Optical Burst Switching)

  • 김영재;조광현
    • 제어로봇시스템학회논문지
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    • 제9권3호
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    • pp.251-258
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    • 2003
  • Optical Switching Matrix (OSM) or Optical Multistage Interconnection Networks (OMINs) comprising photonic switches have been studied extensively as important interconnecting blocks for Optical Cross Connects (OXC) based on Optical Burst Switching (OBS). A basic element of photonic switching networks is a 2$\times$2 directional coupler with two inputs and two outputs. This paper is concerned with the diagnosis of multiple crosstalk-faults in OSM. As the network size becomes larger in these days, the conventional diagnosis methods based on tests and simulation become inefficient, or even more impractical. We propose a simple and easily implementable algorithm for detection and isolation of the multiple crosstalk-faults in OSM. Specifically. we develop an algorithm for isolation of the source fault in switching elements whenever the multiple crosstalk-faults arc detected in OSM. The proposed algorithm is illustrated by an example of 16$\times$16 OSM.

A Low-Crosstalk Design of 1.25 Gbps Optical Triplexer Module for FTTH Systems

  • Kim, Sung-Il;Park, Sun-Tak;Moon, Jong-Tae;Lee, Hai-Young
    • ETRI Journal
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    • 제28권1호
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    • pp.9-16
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    • 2006
  • In this paper, we analyzed and measured the electrical crosstalk characteristics of a 1.25 Gbps triplexer module for Ethernet passive optical networks to realize fiber-tothe-home services. Electrical crosstalk characteristic of the 1.25 Gbps optical triplexer module on a resistive silicon substrate should be more serious than on a dielectric substrate. Consequently, using the finite element method, we analyze the electrical crosstalk phenomena and propose a silicon substrate structure with a dummy ground line that is the simplest low-crosstalk layout configuration in the 1.25 Gbps optical triplexer module. The triplexer module consists of a laser diode as a transmitter, a digital photodetector as a digital data receiver, and an analog photodetector as a cable television signal receiver. According to IEEE 802.3ah and ITU-T G.983.3, the digital receiver and analog receiver sensitivities have to meet -24 dBm at $BER=10^{-12}$ and -7.7 dBm at 44 dB SNR. The electrical crosstalk levels have to maintain less than -86 dB from DC to 3 GHz. From analysis and measurement results, the proposed silicon substrate structure that contains the dummy line with $100\;{\mu}m$ space from the signal lines and 4 mm separations among the devices satisfies the electrical crosstalk level compared to a simple structure. This proposed structure can be easily implemented with design convenience and greatly reduce the silicon substrate size by about 50 %.

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Analysis of the Different Influences of Additive or Subtractive Three-dimensional Crosstalk on the Level of the Visual Fatigue

  • Park, Minyoung;Kim, Joohwan;Choi, Hee-Jin
    • Journal of the Optical Society of Korea
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    • 제19권1호
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    • pp.38-44
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    • 2015
  • Three-dimensional (3D) crosstalk is one of the main causes of visual fatigue and needs to be suppressed. The 3D crosstalk can be categorized into two different kinds according to its appearance-additive 3D crosstalk and subtractive 3D crosstalk. In this paper, we analyze the influence of different kinds of 3D crosstalk to the perceived level of visual fatigue in order to suppress the perceived 3D crosstalk effectively.

Impact of Receiver on In-Band Crosstalk-Induced Penalties in Differentially Phase-Modulated Signals

  • Hu, Qikai;Kim, Hoon;Kim, Chul Han
    • Journal of the Optical Society of Korea
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    • 제20권2호
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    • pp.223-227
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    • 2016
  • The impact of optical receiver configuration on in-band crosstalk-induced penalty has been investigated in both theoretical and experimental analyses, for differential phase-shift keying (DPSK) and differential quadrature phase-shift keying (DQPSK) signals. Previously it has been shown that DPSK signals are ~6 dB more tolerant to in-band crosstalk than on-off keying (OOK) signals. However, we find that the tolerance difference between the two signals is reduced to ~3 dB when the decision threshold of the receiver is optimized to minimize the bit-error rate for each signal. Then we derive simple equations for the in-band crosstalk-induced penalty in DPSK and DQPSK signals with two different optical receiver configurations: balanced and single-ended direct-detection receivers. We confirm that the penalties obtained from our simple equations agree well with the measured results.

Crosstalk-Enhanced DOS Integrated with Modified Radiation-Type Attenuators

  • Han, Young-Tak;Shin, Jang-Uk;Park, Sang-Ho;Han, Sang-Pil;Lee, Chul-Hee;Noh, Young-Ouk;Lee, Hyung-Jong;Baek, Yong-Soon
    • ETRI Journal
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    • 제30권5호
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    • pp.744-746
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    • 2008
  • This letter presents a crosstalk-enhanced polymer thermo-optic digital optical switch operating at a low power consumption. Modified radiation-type attenuators are integrated in a series with a conventional $1{\times}2$ digital optical switch. A low optical crosstalk of less than -45 dB is attained at a low applied switching power of 60 mW, and an insertion loss of about 1.1 dB is exhibited.

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On the Minimization of Crosstalk Conflicts in a Destination Based Modified Omega Network

  • Bhardwaj, Ved Prakash;Nitin, Nitin
    • Journal of Information Processing Systems
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    • 제9권2호
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    • pp.301-314
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    • 2013
  • In a parallel processing system, Multi-stage Interconnection Networks (MINs) play a vital role in making the network reliable and cost effective. The MIN is an important piece of architecture for a multiprocessor system, and it has a good impact in the field of communication. Optical Multi-stage Interconnection Networks (OMINs) are the advanced version of MINs. The main problem with OMINs is crosstalk. This paper, presents the (1) Destination Based Modified Omega Network (DBMON) and the (2) Destination Based Scheduling Algorithm (DBSA). DBSA does the scheduling for a source and their corresponding destination address for messages transmission and these scheduled addresses are passed through DBMON. Furthermore, the performance of DBMON is compared with the Crosstalk-Free Modified Omega Network (CFMON). CFMON also minimizes the crosstalk in a minimum number of passes. Results show that DBMON is better than CFMON in terms of the average number of passes and execution time. DBSA can transmit all the messages in only two passes from any source to any destination, through DBMON and without crosstalk. This network is the modified form of the original omega network. Crosstalk minimization is the main objective of the proposed algorithm and proposed network.

광 다단계 상호연결망의 단일 누화고장에 대한 해석적 고장진단 기법 (Analytical Diagnosis of Single Crosstalk-Fault in Optical Multistage Interconnection Networks)

  • 김영재;조광현
    • 제어로봇시스템학회논문지
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    • 제8권3호
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    • pp.256-263
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    • 2002
  • Optical Multistage Interconnection Networks(OMINs) comprising photonic switches have been studied extensively as important interconnecting building blocks for communication networks and parallel computing systems. A basic element of photonic switching networks is a 2$\times$2 directional coupler with two inputs and two outputs. This paper is concerned with the diagnosis of cross-talk-faults in OMINs. As the size of today's network becomes very large, the conventional diagnosis methods based on tests and simulation have become inefficient, or even more, impractical. In this paper, we propose a simple and easily implementable algorithm for detection and isolation of the single crosstalk-fault in OMINs. Specifically, we develope an algorithm fur the isolation of the source fault in switching elements whenever the single crosstalk-fault is detected in OMINS. The proposed algorithm is illustrated by an example of 16$\times$16 banyan network.

광상호분배기 노드에서 누화와 손실을 고려한 전송성능 및 확장성 분석 (The Effect of Crosstalk and Loss on the Scaliability and Transmission Performance of Optical Cross-Connect Nodes)

  • 이상록;서완석;윤병호;이성은;이종현
    • 전자공학회논문지S
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    • 제36S권11호
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    • pp.15-21
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    • 1999
  • 전송성능 열화요소들을 고려하여 광상호분배기 노드의 극장성을 분석하였다. 고려된 전송성능 열화요소들은 광증폭기에서 발생하는 ASE 잡음 누적과 이득포화 특성, 그리고 파장 다중/역다중화기와 광스위치에서 발생하는 누화 등이 있다. 파장 다중/역다중화기 누화비가 25dB이하이면 10단의 노드를 통과한 후에도 1dB이하의 power penalty를 갖는다. 10Gbps 신호의 다단 전송에서 입출력 포트수가 4와 16일 때 스위치 누화비가 각각 30dB와 45dB이상이면 ASE 잡음누적보다 누화에 의한 성능열화가 보다 지배적이다. 10Gbps 신호를 21dB 손실을 갖는 광섬유 링크 전송시 $10^{-12}$의 BER을 얻기 위해 광상호분배기 노드에서의 최대 손실은 34dB이하이어야 한다.

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